package ioperations;

import book.Book;
import book.BookList;

import java.util.Scanner;

//删除图书
public class DelOperation implements IOPeration {
    public void work(BookList bookList){
        System.out.println("删除图书...");

        Scanner sc=new Scanner(System.in);
        System.out.println("请输入你要删除的书名：");
        String name=sc.nextLine();
        int currentSize= bookList.getUsedSize();

        //找到这本书
        int pos=-1;
        int i=0;
        for (i = 0; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if (book.getName().equals(name)) {
                System.out.println("找到了这本书...");
                pos = i;
                break;
            }
        }
        if(i==currentSize){
            System.out.println("没有你要删除的书...");
            return;
        }

        //开始删除
        for (int j = pos; j < currentSize-1; j++) {
            Book book=bookList.getBook(j+1);
            bookList.setBook(j,book);
        }
        bookList.setBook(currentSize-1,null);
        bookList.setUsedSize(currentSize-1);
        System.out.println("删除成功！！！");
    }
}
